Refrigeration & Air Conditioning Mechanic Red Seal · Question
Which of the following is considered a primary safety concern when working with ammonia (R-717) refrigeration systems?
Ammonia is highly toxic even at low concentrations and is mildly flammable, making toxicity the primary safety concern.
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Question: Which of the following is considered a primary safety concern when working with ammonia (R-717) refrigeration systems?
Answer options:
- High flammability and low toxicity ✅ Low flammability and high toxicity
- High GWP and high ODP
- Minimal health risks due to fast dispersal
Correct answer: Low flammability and high toxicity
Explanation: Ammonia is highly toxic even at low concentrations and is mildly flammable, making toxicity the primary safety concern.
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Question explanations
- Which of the following refrigerants is a hydrofluorocarbon (HFC) and has a high ozone depletion potential (ODP
- Which component is responsible for compressing the refrigerant vapour to a high pressure and temperature?
- According to the Canadian Electrical Code (CEC), what is the minimum required working clearance in front of el
- What is the main operating characteristic difference between a fixed orifice (capillary tube) and a Thermostat
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